The hole in the soil's ozone layer is expected to heal completely within 50 years, climate change experts predict in…
The hole in the soil’s ozone layer is expected to heal completely within 50 years, climate change experts predict in a new UN report.
A fragile shield of gas around the earth, the ozone layer protects the animal and plant life from the powerful UV rays from the sun. As the ozone layer is weakened, more UV rays can penetrate, which makes people more prone to skin cancer, cataracts and other diseases.
Researchers discovered major damage to the layer in the 1980s and identified chlorofluorocarbons, or CFC, which the main sinner.
CFCs used to be common in refrigerators, aerosol cans and chemicals for chemical cleaning, but they were banned globally according to the Montreal Protocol from 1987.
The decline in CFC in our atmosphere as a result of these measures now means that the ozone layer is expected to recover from someone sometime in the 2060s, according to the report of the United Nations Environment Program, the World Meteorological Organization, the European Commission and other bodies.
In parts of the stratosphere, where most of the ozone is found to have recovered at a rate of 1-3% per decade since 2000, the authors state.
The amount of ozone in the stratosphere varies naturally throughout the year, with zone depletion most pronounced in n-polar regions, resulting in so-called ozone holes.
The recovery rate as forecast by the UN report is expected to complete the northern hemisphere and mid-latitude ozone completely in the 2030s followed by the southern hemisphere of the 2050s and polar regions before 2060.
Erik Solheim, director of UN Environment, described the Montreal Protocol as “one of the most successful multilateral agreements in history.”
NASA’s Paul Newman, joint chairman of the report, said two thirds of the ozone would have been destroyed in 2065 if the measures had not been implemented.
In May, researchers at the US National Oceanic and Atmospheric Administration (NOAA) reported a sharp increase in CFC from an unknown source. 19659004] “We are raising a flag to global society to say,” This is what’s happening, and it takes us from the unwanted recovery of the cheese, “says NOAA researcher Stephen Montzka, the lead author of the study. 19659004] Montzka said that if the source of the new emissions could be identified and contain the damage to the ozone should be less.
If it could not be resolved, the already slow recovery of the atmospheric protective layer could be delayed further.